Bridge-gate.



No. 781,373. y PATENTED JAN. 31, 1905.

L; SIMON; R. A. F; DE BANRBT.

BRIDGE GATE. A-PPLIOATION FILED PEB. 15, 1904. REHEWED Dnc. za', 1904.

' bar G, the upper end of which passes through a bearing on said cross-beam E and is pro- UNITED STATES Patented January 31, 1905.

f PATENT OFFICE. l

LOUIS* SIMON AND ROBERT A. F. DE BANRET, OF CHICAGO, ILLINOIS.

BRIDGE-GATE.

SPECIFICATION forrnng part of Letters Patent No. 781,373, dated January 31, 1905.

Application filed February 15, 1904. Renewed December 23, 1904. Serial No. 238,150.

To @ZZ whom it may concern:

Be it known that we, Louis SIMON and RoB- ERT A. F. DE BANRET, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in'Bridge# Gates; and we do hereby declare the following to be a full, clear, and exact description'l of the invention, such as will enable others skilled in theiart to which it appertains to makeand use the same. v l

Our invention relates to a novel construction ,in a bridge-gate, the object being to provide a gate for swinging bridges which is operated by the movements ofthe bridge to close the approach when the bridge is opened, and vice versa; and it consists in the features of construction and combinations of pai-'tsA hereinafter fully described and claimed.

In the accompanying drawings, illustrating our invention, Figure 1 is a horizontal section showing the end portion of a swinging bridge and approach thereto provided withan automatic gate constructed in accordance with our invention. Fig. 2 is a transverse section on the'line 2 2 of Fig. 1, showing our device partly in section.

Our said device is designed to operate automatically with great ease, so that the strains on the bridge-operating. mechanism and on. the structure itself in opening and closing the gate shall be reduced to a minimum.

It is also our object to provide gates which are ornamental in appearance and which etlicientlybar the approach, s0 that pedestrians,

v horses, and vehicles of all kinds cannot inadvertently plunge vfrom. the edge of the approach .when the bridge is open.

To this and other ends our device consists of a frame A, comprising the standards B and D, mounted adjacent the edge of the approach and joined at their upper ends by means of .an ornamental lcross-beam E. The ,post C is mounted in the plane of said standards B and D midway between same and is adapted to receive the lower end of the vertical sliding vided with the antifriction-roller H, which is adapted to be engaged by a cam I,"mounted a rack-bar N, movable in a well formed in said center post C and which carries a counterweight O at its lower end, which is adapted to partially counterbalance said bars K and the operating mechanism connected therewith. To each of said standards B and D We secure projections P, in the upper ends of which are recesses in which the bars are adapted`to be received when they are lowered to Y support same horizontally in proper position to shut off theapproach. Saidvbars are of a length sufficient tov project Over'thefoot-walks Q of the approach, so as toy prevent accidental overstepping by pedestrians.` I is provided with a curved upper edge so arranged as to attain its greatest height at its .middle portion, so that when the bridge is closed the said roller H and barG are held thereby at the upper limit oi" their movement. Said cam I is concentric with the pivot of the bridge for obvious reasons.`

The height of the cross-beam E above the bridge-approach may be changed and varied to suit various conditions and may obviously be changed or varied in form to enable guides for car -trolleys to be vmounted thereon, and

the relativepositions of the standards and the The said cam number and relative spacing of same may obviously also be changed and varied without departing from the spirit of our invention.

We claim as our invention- 1. The combination with a swinging bridge and a cam carried thereby, of a frame mounted onthe approach, swinging bars pivotally mounted thereon, a vertically-movable block mounted on said frame, an antifriction-roller connected therewith and adapted to be engaged by said cam to raise and lower said block, and links connecting said blocks with lsaid bars to transmit motion thereto in accordance with the movements of said bridge. 2. The combination with a swinging bridge,

ioo

of a cam mounted on the upper end thereof,

a frame mounted on the bridge-approach adjacent the edge, a vertical guide on said frame, a block movable thereon, an antifriction-roller connected with said block and extending into the path of said cam to be raised and lowered thereby, bars pivotally mounted on said guides, links connecting said bars with said block. segmental gears concentric with the pivots of 4said bars, a double rack-bar meshing with said gears and vertically movable in a recess provided therefor, and a counterweight earried by said rack-bar and adapted to partially counterbalance said bars and parts connected therewith.

3. The combination with a swinging bridge, of a cam mounted on the upper end thereof, a frame mounted on the bridge-approach adjacent the edge, a vertical guide on said frame, a block movable thereon, an antifriction-roller connected with said block and extending into the path of said cam to be raised and lowered thereby, bars pivotally mounted on said guide, links connecting said bars with said block, segmental gears concentric with the pivots of said bars, a double rack-bar meshing with said gears and vertically movable in a recess "Weijer/ l provided therefor, a counterweight connected with said rack and adapted to partially coun terbalance said bars and operating mechanism connected therewith, and stops mounted on said frame and adapted to receive said bars when lowered to support same in proper relative position to close said bridge approach 4. The combination with a swinging bridge, and a cam carried thereby, of a standard mounted in the middle portion oi the bridgeapproach, a vertically-inovable block mounted on said standard, an antiifriction-roller con* nected therewith and adapted to be engaged by said cam to raise and lower said block, swinging bars pivotally mounted on said standards, links connecting said bars with said block, and a counterweight interposed in said mechanism to partially counterbalanee they weight thereofl to relieve said cam ol strain.

In testimony whereof we aiiix our signatures in presence of two witnesses.

LOUIS SlMON. ROBERT A. F. DE BAN lil'l. lVitnesses:

RUDOLPH WM. Lo'rz, F. ScHLo'rFnLD. 

